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iTNC 530 - TNC 640 - DR. JOHANNES HEIDENHAIN GmbH

iTNC 530 - TNC 640 - DR. JOHANNES HEIDENHAIN GmbH

iTNC 530 - TNC 640 - DR. JOHANNES HEIDENHAIN GmbH

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– Compensating Form Errors of Tools with 3D-ToolComp (Option)<br />

3D-ToolComp is a new and powerful<br />

option for three-dimensional tool radius<br />

compensation. A compensation-value table<br />

is used to defi ne angle-dependent delta<br />

values that describe the tool deviation from<br />

the ideal circular shape (see fi gure).<br />

The <strong>i<strong>TNC</strong></strong> then corrects the radius value<br />

defi ned for the tool’s current point of<br />

contact with the workpiece. In order to<br />

determine the point of contact exactly, the<br />

NC program must be have been created<br />

with surface-normal blocks (LN blocks) by<br />

a CAM system. The surface-normal blocks<br />

specify the theoretical center point of the<br />

radius cutter, and in some cases also the<br />

tool orientation relative to the workpiece<br />

surface.<br />

Ideally, the compensation-value table is<br />

generated fully automatically by way of a<br />

special cycle that uses a laser system to<br />

measure the form of the tool so that the<br />

<strong>i<strong>TNC</strong></strong> can use this table directly. If the form<br />

deviations of the tool used are available<br />

as a calibration chart from the tool<br />

manufacturer, then you can create the<br />

compensation-value table manually.<br />

Z<br />

<strong>DR</strong>2–0.004<br />

<strong>DR</strong>2+0.002<br />

X<br />

11

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